Ключевые слова: backdrops, background, barrier, barriers, big letters, bold, bold lettering, business, caution, close, closed, communicate, concepts, danger, dangerous, deter, eliminate, fence, fences, forbidden, hazard, information, intrusion, keep out, letters, message, no, no trespassing, obstructions, obvious, outdoor, posted, protection, red, restricted, risk, safety, secure, security, sign, signage, signs, symbol, symbols, text, trespassing, vandalism, warning, white, work,