Accidentally CHMOD 777ed /etc folder

Yes, yes before everyone internet scolds me, it was a dumb idea.
I was a bit aggravated at not being able to alter fstab and grant myself read/write permissions for ntfs external harddrives (I still don't understand why Apple doesn't give write permission to NTFS "officially")
To cover my bases I repaired them using disk utility

I know that files that didn't come installed on the system pretty much won't be covered but I just want to make sure that the system files are okay from harm and this won't get in the way of other programs down the line (like running a server in five years and the permissions are all screwed up)

Reinstalling the OS is a no go, my father uses the computer and would never wait (espcially a new one) or want to even attempt to do any of that since he had tons of problems with our last computer.

So I'm just asking in the functionality and safety will relatively be okay (programs will generally all right, nothing requiring major alterations to the computer and such)