Very interesting discussion.
I think pre-emptively using 'some' is really widespread in debate anyway but even when precise statistics are used there are still people ready to shout 'liar' or derail on other grounds.
Kim is right and it would avoid some derailments but, like others have said, catering to the people who are more concerned with misconstruing context and taking personal offence than discussing important, even life and death, matters seems a bit pointless.
Their priority is defending their personal feelings (which are irrelevant when discussing men as a class) and weakening the original point, not engaging with it. So not using 'some' all the time will probably only put off people from feminism who don't really have in them (at the moment) to be genuine allies anyway.
'All men...' means all men do it.
'Some men...' means some men do it.
'Men...' depends on context.