But it isn't a siege weapon, because it is an improvised weapon, there are rules and that is what we are discussing.
Improvised weapons rules are in the
Player's Handbook. Last time I checked, tarrasque's weren't PCs. So it seems like it makes a lot more sense to me to use some common sense, and realize that a building/boulder/wagon isn't anything close to what a weapon that a PC might use who isn't proficient in. And even if you're lacking in that basic level of common sense, we can look at other monsters who throw things. Like giants. And extrapolate from there what sort or range and damage a tarrasque would do.
Using the PC's improvised weapon rule as a way to support how you think the rules are broken seems awfully disingenuous to me, because I know you're smart enough to see the fundamental flaw in doing so (as I just mentioned).
You know what I am tired of, you and people like you that come into discussions about the RULES of the game, and start saying useless things like "just wing it" "DM just makes crap up" "The solution is your imagination"..blah blah blah.
We are not talking about how the DM can do whatever he wants, we ALL understand that, we do, so maybe you can stop shouting it from the roof tops as the answer to real rules questions and concerns.
When talking about rules it is not productive to say, "just ignore them".
So step off.
I'm not shouting DM fiat from the rooftops. I'm saying it gets really old that
you appear in every thread complaining about 5e and how it's broken, the designers are lazy, the design is horrible, etc. And seeing as your logic is on extremely shaky ground (see above), I'm beginning to wonder if you're just complaining because that's what you do. To which I say, stick with games you like and stop crapping on literally every discussion in the 5e forum.
Also, this isn't about just using your imagination, because figuring out that a tarrasque can throw a big object if wants isn't really all that imaginative. What we're talking about is that for
simple common sense things, there doesn't need to be a rule for literally everything. Which is what you seem to be implying or arguing for. If you honestly can't figure out for yourself that a hurling wagon would probably do more damage than an improvised table leg a PC uses, I don't know what to tell you.
I wonder if the DMs who come up with all sorts of advantageous attacks for the Tarrasque that are expressly missing from its stat block would allow the for the same (advantageous attacks not in the rules) for the PCs?
I can't know for sure, but I kind of doubt it.
And you would be very wrong. All of us that have argued in favor of doing things (not just advantageous attacks, but anything it would reasonable do), sure as hell encourage that from our players, and do so when we are players ourselves.
Unless something is expressly forbidden, it should be allowed within reasonable interpretation.
That applies to everyone and everything. Monsters, PCs, NPC, etc. If a player wants to leap on a table and do a flying tackle on a target, let them try it, even if it doesn't explicitly say so on their character sheet.