is it bad to smoke 3 cigarettes a day “Just 2–3 day… that’s okay, right?”, Not really., There no safe level of smoking — even a few cigarettes continue damage your arteries. And with Indian genetics and narrower Health effects associated with smoking:
Description
Related: TSA Checklist (Tips & PDF) Checking your bag at the gate Sometimes your plane may not have room for your carry-on, especially if you are towards the back of the boarding process

Will vapour harm the people around me

While the levels of these substances are far lower than in cigarette smoke, the long-term effect of exposure to them is unclear
Reproduction & Life Cycle The female beetle lays her eggs in or on the food material

Journal of the National Cancer Institute 2012;104(4):2908

Likewise, the nicotine in the cigarettes can cause nicotine stains on walls, surfaces and ceilings