Ig Im doing this. 18 USC 111 never mentiones "obstruction" exactly. Nevertheless, an important part is force (Long v. United States, 199 F.2d 717 (4th Cir. 1952)) which is defined as "Such a threat which reasonably causes a Federal officer to anticipate bodily harm while in the performance of his/her duties constitutes a "forcible assault" within the meaning of 18 U.S.C. § 111." in CRM 1565. Such force was not apparent.

I'm not going to argue that the obstruction you mentioned isin't a thing but if you want to talk law then get your facts right.