They use name calling & insults. This is to discredit #Remain.
Also they hope to goad Remainers into an emotional response so they appear overly motivated and therefore less convincing.
If people see something repeated often enough like FBPE is anti-Corbyn it becomes accepted by people as being true.
They make a counter-accusation (eg 'Stronger in cheated too!') to put Remain on the defensive. The side that is having to defend is usually seen as losing and the original point gets lost.
Pick YOUR agenda.
Tweet about it. Try to keep these issues top of your priority list and not to be deflected.