The load bars are indicators of how much load your account is doing averaged over the last day in comparison to the other accounts on the server. If it says 100 that means your account is causing more load than any of the rest of the accounts on the entire server. If someone causes a lot of load and passes you your bar will go down. If you cause more load than someone else your bar will move up.
Some of the other admins want to ban Wordpress entirely, but I think some people are able to use it without issues. There are literally hundreds of wordpress installs on our servers and only maybe 1 or 2 get suspended each day.
HelioHost is used quite a bit by people who have no idea about webhosting, and want to try it out for free. Unfortunately Wordpress is so well known that it's literally the only thing that some of these people have ever heard of so of course they install it. As long as you're on Johnny or as long as you don't really get any visitors to your site it's not a problem, but if you're on Tommy the threshold to get suspended is much easier because we want to keep Tommy as close to 99.9% uptime as possible. On Johnny load isn't as big of a deal and we don't suspend nearly as many people so the uptime is only around 92% right now.
The way I see it, Wordpress is like the kid's Mattel version of a website. It's really easy, everyone has heard of it, and you play around with it and you learn a few things. Hopefully as you become more knowledgeable you're finally ready to graduate to some sort of grown up software, or better yet write your own code. I'll admit it. Even I installed wordpress like 10 years ago when I barely knew anything about webhosting. The website was online for about 3 days and I hadn't told anyone the url or anything yet and it got hacked. That's when I started asking myself, "What on earth could be so wrong with this software that it could get hacked so quickly and easily?" Here we are 10 years later and really nothing has changed.