Nearly 7 million people watched leaders lock horns over the NHS in the first TV debate of the election.
The party is promising billions more for schools in England, taken from a £50bn so-called "Remain bonus".
Twitter said the stunt was misleading to the public and would not be tolerated in future - but did not take any direct action.
The man, detained in August, says he was blindfolded and beaten for his part in Hong Kong's protests.
The telecoms firm says it could resume the connection if the Duke of York ended his role as patron.