Was on a server this evening where my ping registered as 120 in game.
Had the 'spawn firing uncontrollably' bug several times, but I also found that often when I pressed the left mouse button it was rather unresponsive. Haven't had that noticably on any other servers, and this server seemed lag-free in terms of player-movement. Hit reg was a little flaky on it, whereas I usually find it okay on 120 ping servers.
I had those both too today, don't remember the ping, wasn't too bad (maybe 50-70).
Is that "unresponsive shot" something the server has as a setting? I remember playing Insurgency mod for HL, and it had so that your first mouse button press didn't register as shooting to prevent accidental spawn TKs.