I bet I watch a lot more than you do though
As I said, it's difficult to estimate the incidence, because the prevalence (referees in the association who have experienced it) is higher than the frequency of incidents (due to the massive number of referees who quit each season). As a spectator/player, I've only seen one incident. I've seen a good deal more either as a ref or an assistant. I've also been informed of a number more that I haven't seen:
Offhand I can think of....(including my 3) ('seniors' includes premier league/Div1, and men's all age - and the 'out of area' ones are mostly at Kanga Cup in years I attended)
-referee with flag pole thrown at him (different area) - juniors
-referee with water bottle thrown at him - juniors (out of area but involving local refs)
-refereeing team followed in a car - juniors (out of area but involving local refs)
-player standing in the face of a short female referee and screaming obscenities - O35
-player threatening to bash referee - seniors
-spectators threatening to slit the throat of a referee - juniors
-player shoulder charging ref - O35
-spectator getting in referees face and pushing him after the match - seniors
-player grabbing ref and threatening him (Kanwal incident - seniors)
-Manager threatening ref - juniors (out of area but involving local refs)
-Player threatening to 'get' a referee after the match - seniors
-Player walking towards referee with fist raised (seniors) - x2
-Player pushing referee (seniors)
-Player punching referee (seniors)
-spectator grabbing, pushing and threatening the ref after the match (can't remember the age)
-Manager threatening ref (out of area)
-team threatening ref at a restaurant (out of area)
-Player grabbing card out of referees hand (seniors)
-Player getting in the face of referee, abusing and threatening him, needing restraint by teammates (O35)
The majority of those incidents have occurred in the last 4 years, and naturally don't include typical instances of players abusing or even eyeballing referees. I vaguely recall another couple of incidents locally, but I can't recall any specifics.
So yeah, maybe I was mistaken in estimating 1 in 10 - there's probably about 1in20 refs in the local area who have experienced assault or threats, going from the above list (almost all those referees are still officiating), but when you consider the cumulative number of officials over those years, the ratio is, admittedly, much lower. But certainly higher than 1 in 1000
There's a lot more incidents in other areas that I'm aware of - the forum I go to has a 5 page thread listing such incidents, but I haven't bothered posting those ones. Some officials on there have suffered multiple assaults, and they are some of the nicest, most respectful, calmest guys you'd meet who don't flaunt their authority nor demand respect, and are aware of controlling their body language and personal space to minimise antagonisation to players. Some are a bit more authoritative, but that seems to be what's required to impress the right people to move up to state league and so forth (and that doesn't justify assault, even though some people really hate authoritative referees).
Honestly I have absolutely nothing to gain by exaggerating or making up these incidents or anything else - the only point I attempted to make on this thread was that, if you're one of those who believe the sentence is too lenient, then it perhaps shouldn't be too surprising as CCF have demonstrated some extreme - even frightening (saying that the referee can't prove an assault happened is something I find incredibly disturbing) - leniency in some incidents, but have acted quite capably at other times.
How this got onto a discussion on statistics, or whether or not I use common sense or if I'm an arrogant, self-righteous punk in black I'll never know
Jeez, last time I try to make a brief statement!