Not an issue for me at all! I deliberately have a slower POSSE process for “likes” and such, where I take the time to post on my site, with some commentary about the original post.
This shields me from the “like everything” that happens on silos and I only collect deliberate, reasonable things I like on my own site.
Edit: Also experience with bridgy suggests that silo APIs are quite unreliable; Twitter sometimes does not return favs for instance. I would hate to lose posts because the silo API barfed.