Those spammy comments are indeed a problem. The only thing that can be done is flagging but I tend to stay away from flagging anything that isn't extreme. Honestly though, you can get this with any platform. Kind of like all the BS I used to get on Facebook.

The important thing to remember is that there are sincere users on here, and we just have to filter out the ones that aren't. Anyone who comments something rather vague on my posts, does not receive an upvote and ends up at the bottom of the comments.