Really ??? It rarely if ever happens at games
I've had it happen a few times over the years. Not been ST holder for 30+ years so have sat all around the ground and perhaps the fact that I'm not a 'regular' and am quite obviously not a Manc attracts some of the knobheads.
To be fair, I at least look like I can take care of myself (even though I'm a big wimp) so nothing too serious has happened. Just don't need it at all really.