I avoided Blockbuster because their prices were so high, although there were times I did rent some new release movies just for the fact they always had like 40-50 copies of the same move.
You are the minority, it's not really about what you would do specifically, it's what the general user would do.
Internet users have learned to ignore images , it's why google adsense/adwords became so popular.
An isolated incident is not enough to do a recall.
Even if they find an issue, I doubt they would admit it unless they had to. (it's also possible that they already knew it was an issue and are just keeping quiet until they have to do something about it)
Xenforo is light-years ahead of MyBB, not sure why anyone would even think of switching over to mybb from this is beyond me.
The community for xenforo is much larger, more active and has tons of addon options that are actually supported and updated.