Wait. So you got caught smoking heroin? And you're pissed that your parents are going ape shit?
Or are you mistaking the phrase "dope" as a slang word for marijuana. I've honestly never heard anyone call weed "dope" except for people who don't do drugs.
If it's just for marley, relax. Most parents go ape shit the first time they hear about their kid smoking but eventually come around. If you aren't a dumbass about your smoking and fully understand what cannabis is, tell your parents and they should respect that.
...People should really post how old they are. I'm answering this like you're older (17,18,19) But I'd probably tell you something totally different if say you were 14, 15.