Visitors giving money to the church (I apologize in advance if this question isn't appropriate for Christianity S.E. .... this seems to be a trending problem.  With that said, I believe the ideas of the question are appropriate and I invite anyone that thinks this question is inappropriate to edit it so it's rephrased more appropriately).

From my experience, many visitors at churches feel that they need to give money and most churches (not all) do this by passing a collection plate of some sort, this method seems to even embarrass or coerce visitors into donating to the church.  I feel that the people that should give their money are regular visitors that genuinely want to help the church (regardless if they are believers or not) and members. The reason I think this post is important is because I kind of find it strange when attendance balloons two days out of the year, as does the collection; plus, I think it is discouraging for the average new visitor.  Specifically, I am looking for scripture that will support or refute the claim that the method by which most churches collect money is un-Biblical at worst and awkward at best.
There is no New Testament directive as to the means of collecting gifts , monetary or otherwise.
The question is whether a means of collecting gifts fosters the Biblically directed attitude of giving.

2 Corinthians 9:7 Each of you should give what you have decided in your heart to give, not reluctantly or under compulsion, for God loves a cheerful giver.   

Matthew 6:1 “Be careful not to practice your righteousness in front of others to be seen by them. If you do, you will have no reward from your Father in heaven."

(Note that this is directed toward the motive of giving. If you are giving for human praise, that's all you get. However if you give because it is the right thing to do, you have further reward, even if somebody does see you do it. After all Jesus praised the widow who gave at the Temple in the sight of many).

Personally, I think the current form of collecting offering is for practical fund raising purposes only.