Changing compression and rebound with shocks has no adverse affect,but changing ride height with shocks will alter caster and camber settings.JMO but I dont change ride height after I set my alignment.Up goes the height and your tires have no choice but to wear on the outside edge. Changing height with shocks for short runs is fine (ie: racing)but it will change the specs of the alignment that was done at a different height.Shocks are not intended to support your car that is the job of the springs. Some will change shocks for more support on cornering,money would be better spent beefing up your sway bar.Changing ride height no matter how its done affects control arm position which affects caster and camber..I am not knocking adjustable shocks,but if you change ride height after your alignment(for extended periods of time) it will affect tire wear.
This is of course JMO after 40 years under an alignment rack..And 25 years of building suspensions on round "D" round race cars.
This is a topic that has been debated for years and always will be..