czesio doesn't even put down a factory, just builds singu in my base, I move my base and he proceeds to build 3 singus back to back with no space between them. Gets nuked and first thing he does is build another singu next to our antinuke.

If people feel that this kind of play is disrespectful to them as teammates, report it. A pattern of behaviour may be modactioned even if a single incident is not.

If the community makes it clear to the moderators that somebody's pattern of behaviour is disrespectful, the moderators will do something about it. I don't think anybody wants to see what would happen if the moderators just went around banning everybody that we think conducts themselves disrespectfully in games.
[Spoiler]

quote: he often makes the game win with this tactic

Even if doing this sometimes wins games, turning the game into a coinflip based on "does the other team happen to find and kill czesio's singu farm" is liable to feel pretty bad for the other players.

czesio did build 3(?) singus or so in a clump in the back. these were in the farthest and most protected spot from the frontlines. also burried if i recall correctly. so i would not see this as a bad example. on the contrary, TinySpider 's team did not respont to the nuke thread (or its scouting/discovery, i don't know) in a resolved manner. the nuke hit and killed the unfinished anti along with the singus.

czesio's singus and gridding got 25000k extra metal for his team by the time the nuke falls. This is by far his most effective play given his computer can barely play a Zero-K lobsterpot like this.
I expect the substantial UI and action lag that afflicted him plays a role in placing things in nearby places.

Note also that all later singus are spread and elevated to protect from fleas.

I'm also a bit amused about the argument about the mex.
That was a 21m/s mex, a very high priority task that if I was in a 1v1 I'd prioritize over pretty much anything that didn't cost me my army/the game.