The question these people should be asking is "What exactly have I done to help people today?". You can argue that the D2D work is actively seeking people to reach with a message. You can argue that approaching people in the street and engaging with them is actively seeking people to reach with a message.
Standing next to a trolley not looking at people, not trying to initiate conversations and not engaging is not actively seeking people with a message. It's a waste of time masquerading as God's work.