Please see Post 29 for a truly awful post bragging about being a slacker in service and laughing at the good people that thank him for his service.
Post 29 is reprehensible.
That is a truly awful post and I have no idea why he would say something like that other than to besmirch the military and dishonor those that served in it.
I was in the Marine Corps during the 1980s and back then "slackers" were referred to as "skates". They would do only the minimum required and would find ways to stretch two-hour tasks into an all-day affair if they could get away with it. Nobody respected them because they only made more work for everybody else and they would eventually get re-assigned to just scut work, so they only really hurt themselves. But then again, we still needed Marines to sweep floors, clean bathrooms and empty trash cans, so I thank them for "volunteering" for those tasks so that the rest of us could focus on the important things.
As for marijuana, at least during my time on active duty, there was random drug testing going on so not very many took that kind of risk - except maybe the skates, who were E-3 or lower, with nothing to lose.