San Francisco, April 2: Photo-sharing platform Spchat on April Fools’ Day trolled Facebook by introducing a filter that makes it appear as if a Russian bot has liked your post. The filter places a Facebook user interface around a user’s photo with Cyrillic script-like text and even includes likes from “your mum” and “a bot”, The Verge reported late on Sunday. Spchat’s filter was only available on April Fools’ Day.