There are many complaints Facebook suppressed speech by political groups [1]. Twitter is known for suspending accounts for political speech they deem unacceptable. Google was recently observed ham-fistedly removing search results about guns from Shopping, which was discussed at length on HN and the hilariously incompetent way it was done was source of much entertainment. Google is also pushing out gun-related content from Youtube.

[1] https://www.dailywire.com/news/28313/study-heres-proof-faceb...