Signature spammers became big part of this forum and in fact, it caused quality of discussion to decrease. Not decrease but basically they killed it.

I, hereby offer a solution;

When creating thread, another additional option should be available and that should be something like; No Signature

What this feature will do?

If someone replies to a thread, his/her signature will not show up. Basically it will be empty.

Which, as signature spammers slowly realize that their effort to spam certain threads is not working, they will put their focus on other threads they can spam and this will create space for quality discussion at certain subs/threads.

This might be a good punishment mechanism to prevent unnecessary replies made by sig spammers.