is it bad to constantly reload squid.conf

[squid <squid@xxxxxxxxxxxxxxxxxxxxxxxxx>]

Hello,

My question is, would it be 'bad' to reload squid.conf, up to 100 times 
within a very short space of time? If so, is there a 'better' way of 
getting Squid to acknowledge changes made to an ACL?

I work in a school and have created an ACL which reads in pupils network 
ids from an external text file this then allows them to access the web. 
The contents of this file are dynamic and pupils ids are added via a php 
script after they agree to abide by the schools internet policy.

Currently, every time a new user is added to the list the squid 
configuration file is reloaded. It is possible that this may happen many 
times (up to 100) within a few seconds.

I'm a bit of a newbie to all of this so apologies if i'm going over old 
ground..

Many Thanks