I have a number of tax clients who have alternative income streams. My practice covers clients ranging from factory workers to medication suppliers, ballet dancers to pole dancers, ex pats to undocumented workers. I've pretty much seen it all.
When medical marijuana laws were passed in my State I did a ton of research on tax strategies. While the IRS was a bit thin on guidance at the time, early days of the medical marijuana movement, I've never seen an instance of the IRS sharing information with other agencies.
OTOH, I have seen plenty of desperate people who are in trouble for not filing taxes and/or declaring income. They want to buy a house, apply for a green card, renew visas, are facing tax inquiries, audits, employee challenges. You name it, I've likely dealt with it.
My advice? File your taxes properly. If you don't know how, find a good tax professional. If you're in a line of work that falls into an alternative category I recommend working with someone who takes a more conservative stance on tax treatments of income and expenses.
My 2 cents. No charge.