There should be designated standing areas throughout the stadium. Thus, those that want to stand do not block the view of those that dont.
As things stand (or not ) this issue will not go away, and won't be addressed by the authorities until such time that all fans act together. All fans at all clubs (as it's a problem at all clubs) should stand in protest, and all walk out when any individual is escorted from the premises. Chances of that happening are probably nil mind you.
Throwing people out of a stadium when they were standing at the far end of the East stand where the pitch view down the touchline is very poor, and where they are not blocking the view of fellow fans is a joke.
It seems you can stand at any major event, or journey in public transport, but not a football match with less than 30% of the stadium full. madness.