Those cautions are very good tips for people looking at self treatment. It does take patience to treat and most of the time everyone wants to take the dose and triple it so the problem goes away that much faster.
I had the bad habit of really hammering down on trigger points, especially the ones in the upper trap area. Probably didn't help that I got my CoC grippers and my trigger point manual around the same time lol. Some tp's require more pressure than others, which is why my hands love my theracane. :)
One of the most important things is the underlying cause. Squeezing trigger points won't fix the posture of the person slouching all day in front of the computer screen.
The strength trainee says "Why sacrifice intensity when I can sacrifice volume"
The bodybuilder says "Why sacrifice intensity when I can sacrifice form"
"We are not sport, when there is a sport issue, we are not so good. The boxer is much better than us at boxing. But he will have to protect his balls if he wants to punch us."