Also, just going to point out here that Pair.com has had a great reputation in the hosting industry, and has for the last 10 years.
I've been in the industry for 10 years and worked for quite a number of hosting companies, not Pair though, and when you have 150 shared clients on a machine and 1 client is causing the problems you do your best to deliver the warning before it gets out of hand but it is very hard to do.