MergeInfo on individual files - can they be safely removed?

Whenever we merge code, many files in our codebase get updated
mergeinfo's with the new revision number, even though they were not
changed in this revision. From some searching online, this seems to
be a common situation, and it appears it might happen when not doing
merges from the root. There seems to be two attitudes of people
commenting on this situation: (1) do not remove the mergeinfos as it
might cause problems later on, and (2) it is perfectly fine to remove the
mergeinfos on files so long as the merginfos are preserved on the root
folder, and that merges should always be done from the root to prevent
mergeinfos from being set on individual files.

Is (2) correct, and it is safe to remove the mergeinfos on individual files?
If it is, I understand that something like the following would work:

|svn propdel svn:mergeinfo -R
svn revert .
svn ci -m "Removed mergeinfo"|

-- 
David Brodie
BEAMS Release Manager
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