For example, if I wear a signature of a gambling house, do I need to talk in terms of supporting them while I compose posts?
How about campaign managers' and campaign owners' stand on this?
No, not at all, and that would probably be seen as shilling, which is not well seen, and pretty close to, if not, shilling.
Probably most people do not know fully well what’s really on their signature, and talking about it could even go against them (i.e. saying a lot of conceptual uncertainties).