
Update:

“Dear PoPville,
Last night my friend and I came to a hockey game and when security personnel saw Ukrainian flags, they told us Ukrainian flags are not permitted by Capital One Arena and wouldn’t let us in unless we get rid of the flags.
Keep in mind Ovechkin, the captain of Capitals still has a profile photo on his Instagram with Putin.”
Ed. Note: Marcy sends the photo of the Harman Center/Shakespeare Theatre below, across the street from the Capitol One Center:

Capital One Arena’s website says:
“Unless otherwise specified by teams or event management, guests are welcome to bring small signs, posters and flags for events. Banners are not allowed. The following guidelines apply:
Item must be related to the event.
Item may not be attached to a stick/pole.
Item may not obstruct any sponsor/building signage.
Item may not be attached, hung, taped and draped over any part of the building.
Item may not be commercial in nature.
Item may not contain or display obscene/offensive language and/or pictures, as determined by Capital One Arena Management.
Item may not be constructed or displayed in a manner that may obstruct the view of other guests, interrupt the experience of other guests, or create a safety hazard.
Signs must be constructed of paper, fabric or poster board materials.
Signs may not be constructed of or contain plastic, wood, metal, glass or any material that can be used as a weapon.
Item may not be commercial or political in nature.”