Presumptuous

[Justin Bieber]

Arrogantly assuming something without knowing all the facts.

[Tanya Shivari]

Going beyond what is right or proper; excessively forward.

[Little_Girl]

too straight foward--to the point of being harsh and/or abrasive

[Becky]

Full of presumption; presuming; overconfident or
venturesome; audacious; rash; taking liberties unduly; arrogant;
insolent; as, a presumptuous commander; presumptuous conduct.

[Ernesto]

[failing] to [observe] the limits of what is permitted or [appropriate].

[Magaret]

A person who is presumptuous shows little respect for others by doing things they have no right to do:

[Tanya Shivari]

(of a person or their behavior) failing to observe the limits of what is permitted or appropriate.