What is important to realize is that on all sites where we have "hot stuff", this will eventually happen. Especially when people have followers. And when you are popular enough the quality of your stuff no longer matters. You get upvoted out of friendship then, and that messes up the charts, and then this is the result.... What to do about it? Nothing... This is the way it always has been and always will be... Not only on the internet by the way. Computers can calculate quantity, but it cannot judge quality. And since a lot of people value quantity over quality (or so it seems), this will always happen.
Best is to grin and bear it, or try to follow people you know to be good memers, and to focus on streams that interest you.
No matter how you set up imgflip.... This will always happen. Heck, this happens on all sites.