Its perfectly ok,I might be wrong too,but I know cases where people were using namespace from other boxes and it didn't work,once they checked they found out theirs was different.
I believe this is because the little differences in the frequency when tuning a channel,since all the other data is the same for anyone,the frequency people scan a channel in,specially when blindscan,might differ from machine to machine,and this would create a different namespace.I think this is how it works : a difference of 1 MHZ would do that,and the machine would still lock,even 10 MHZ would.
I think best way is to show oscam users how to get it on their own,but that's just my opinion.