It says so directly on the
gloves page.
Yes.
Will it? Who knows, but you can be sure Valve keeps track. There haven't been bans in a long time, it could just be a matter of time though. Or it may never happen.
You could possibly run it without ever getting your account banned, but why would you risk it if your account matters to you? If someone wants you to run those plugins, have them give you a token to use.