Three decades of change -- email, computer security, surveillance cameras, normal people not giving a shit if someone's said to be gay -- have made huge swaths of these tips obsolete. The rest range from goofy (swiping your target's hat and replacing it with successively smaller facsimiles; pretending to be the target and challenging someone to a fight over CB radio) to unrealistic (first intercept your target's mailed application for a new car registration...) to overly niche (Work in a machine shop? Miscalibrate your victim's tools!). For all I know, some might be effective. But the writing is dull, and unless you have an obsessive need for revenge, reading H. Allen Smith's classic "The Compleat Practical Joker" will be a much better use of your time.
This book is just straight peak gaslighting with good and bad intentions. There are so many ways to handle your enemies but to directly cause indirect physical changes around them is sure one of the ways they are really mentally messing with their target. Book itself is readable but does this subtleness affect how others think and cause trouble? I don't think so. Unpractical with some tips useable.