To answer your question you should be extremely safe, I'd be surprised if you got banned. Even if your bot failed a random you wouldn't get banned I think Edit: Mainftw is right
I recommend you alch at Soul Wars, right in front of the bank chest. Reason? It is pretty much impossible to get banned there because there is always like 10+ people there autoing, and also Soul Wars is an area where there are no randoms.
I would think that it is pretty suspicious to be sitting in your POH doing something like alching all day..... I honestly don't think you would get caught for it though, I botted 99 magic standing at the sw chest 15 hours a day without any problems.
I've been running RiD's firemaking bot in POH in build mode from 89-99 fm on my main. and 50-95 firemaking on a friend's account that I'm hosting his RiD bot on for, and I haven't received a single random during my 150+ hours botted there. I've used used the Construction bot in build mode all the way to 99 without a single random. So, TL;DR, there are no randoms in your POH in building mode.
@trent I think its just certain tasks only. For example I 've gotten atleast 5 randoms from 60-85 magic training teletabs on poh in build mode. Aswell as when I was making rock walls, and tables Because when you have fire, you have items on the floor. I don't think jagex would teleport you away and make you use your crafts.
you should be a bit safer but i dont think it makes a greater diff. I botted mage @ soul wars and i was fine
I've alched in my PoH, & I've alched in SW. Either one works fine, although in Soul Wars I like being able to control, "when do I need an exp lamp for a skill?" Edit: I did 99 crafting in Soul Wars, so I mean there is always that suggestion.
if you have an autoclicker, then make sure you have the bot set to randomly clicking stead of having it click the same placed over and over like an autoalcher.
I did auto stunalching on the sphere (that magic training ball you can build on a pretty low lvl); best xp evar. No randoms in building mode. Only problem: A bot alching next to a POH Portal is a reported bot.
Prayer. You can fletch, cook etc in there if you really wanted to although it wouldn't be a good idea considering banking, teleporting there just to fletch then teleport back to bank. With that being said FM really isn't that great either, just bot at w100 shantay pass.