"Sensible" location for Sieve scripts

I'm configuring some Sieve scripts for virtual users. I'd like to keep the Sieve scripts somewhere "sensible".

Currently, all the mail goes into /var/mail/vhosts/<domain>/<mailbox>

So I thought a good place for the sieve script might be in there as well, for example:

/var/mail/vhosts/example.com/username/sieve

Is there any reason *not* to store the sieve scripts in the same location as the mail?

Thanks,

Andy