So who is this related to exactly? I don't see the point in putting 'those'? Just reply to them directly, or ask them upfront. If needs be, take it to a personal message.
If this relates to me, I've already posted above that I swear, shout and wave my arms around at players, but I draw the line at booing. It has a different effect.
I noted your response earlier to the question earlier - it didn't really address the crux of the point I was making.
Your second paragraph puts you in line with some of the things I have been known to do at games. Now, there are posts in this thread where any kind of negativity (be that boo, shout, groan, tut etc) has been lambasted with variety of terms (fickle, for example) labelled on those who are negative to varying extents (I'm afraid if you shout at players, you've joined the dark side).
If calling out a player who is not putting in the effort makes me so fickle then so be it. However, I'm still interested to know what those banding such terms around would do if performances and effort levels went downhill big time (for example, we lose 10 games on the bounce with poor attitudes from the players). If they think that the response should be to get behind the team even more then fair enough - I applaud them. Nevertheless, I'm putting forward that it is also a perfectly understandable reaction to get upset that your support of the team is not being replicated by the players. Some may choose to boo, others (like me and you) might express our feelings by shouting. Posts like "go down the wolves", "you're not wanted" lack any empathy for an alternative viewpoint.
You'll struggle to find a prouder Albion fan than me (travelled round the country, spent thousands yadda yadda yadda, chant like a maniac all match). That said, occasionally I get upset with team/individual performances and vent this frustration by shouting, commenting...whatever. In the eyes of some, this may make me a poor excuse of a supporter. That's their opinion - fair enough. But as I mentioned in an earlier post: the day I sit silently and clap until my heart's content is the day I start watching rugby.
Anyway, I've said my bit; I'm finished with this topic now.