From the other discussion that was linked to, you can see it's an on-going debate.
Some people feel strongly that they are just 'suggestions' and not to worry, because nothing at all needs to be done about them if there's nothing wrong.
Others notice that data doctors officially see that 'suggestions' are a list of things to be fixed and "fix" them.
Personally, I feel that seeing something like "Empty birth date: The WikiTree profile has a link to a FindAGrave Memorial with a birth date set but the corresponding WikiTree profile has no birth date entered" is akin to a suggestion that might say "Empty birth date: WikiTree profile has no birth date entered, but this rando with a tree on Ancestry has one." It's worse than annoying; it encourages people to use unreliable information.
However, it's been made very clear that no changes to this system will be considered, because they're "just suggestions."
I feel the best way to deal with it is to stay on top of all the "suggestions." Otherwise, someone else will come along and do it. I'll take a glance to make sure there aren't any bad links, mark them as "Corrected Forever" or whatever that option is (so they don't come back), and add a note that "FindAGrave is not a source." I never bother to look at whatever junk data the system is suggesting.
I'll probably get in trouble for being a subversive, but there you are.