Con, please see
https://bitcointalksearch.org/topic/m.9805837
i see your options as
a) censorship.
b) a better filing system for threads.
Locking threads is a deliberate attempt to seclude information away from browsing 'coiners and in this case, merely shows the lack of respect the Forum has for it's longer standing members.
PLEASE ALSO LOCK ALL OF DOGIES REVIEW THREADS, or MAKE CHILD BOARDS.
your comment quoted above, smacks of double standards and if you are locking one single manufacturer review threads and not locking others then this could be seen as you, and this Forum being complicit in a 'Restraint of Trade' that's a legal term, look it up
Without Prejudice.
Rus