When questions becomes spam

I don't think it is limited to just questions. The comment sections of webinars are full of comments that simply say, "Thank you." That doesn't really add much to a discussion and may just be added there to collect points for the website. I can't keep the "Notify me via email when someone posts a reply" box checked when I comment on a webinar because I get hammered with notifications because someone has simply said, "Thank you," on a webinar I watched. It would be great if we got notifications only if someone interacts with our posts but right now it is all or nothing.

I wonder sometimes if users are just trying to earn another website participation badge.

I totally agree with you Sergio. There are many questions from a single individual on forum, that i guess either to get some attention or gain some points on the website. Some questions are just repetition , some are so primitive and basic (even in era of google). Whatsoever it looks so annoying when there is no serious efforts to keep the forum focused to real big and challenging issues of PM field, sharing and supporting the users with real Project life experiences, providing guidelines.e.t.c

I'm on the fence as to whether it is to increase some metric like "influence score" or just adding content for the sake of new content.

Either way, like filtering email, I'm pretty good at ignoring things that don't involve me.