603712 - Default header field for mailing multiple addresses is "To:", should be "Bcc:"

Status: UNCONFIRMED

(Thunderbird :: Address Book, enhancement)

Description

[Leszek Jakubowski]

User-Agent:       Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.10) Gecko/20100915 Ubuntu/10.04 (lucid) Firefox/3.6.10
Build Identifier: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.12) Gecko/20100915 Thunderbird/3.0.8

When selecting multiple addresses from the address book and choosing "Write" from the context menu, the default behaviour is creating a message with "To:" entries. Shouldn't the default be "Bcc:"? 

I know that when I receive an e-mail with 50+ e-mail addresses of strangers it's essentially a PEBKAC, but there's usually no bugtracker or a patching schedule for people.

I've seen several other ideas in the bugzilla which partially solve the problem (bugs 485914 558730), but they still require an additional user activity to comply with the general Netiquette.

I'm not sure if adding an additional menu item "Write (Bcc)" above the "Write" is enough.

Reproducible: Always

Steps to Reproduce:
1.Open Address Book
2.Select multiple contacts
3.Right click
4.Select "Write"
Actual Results:  
New message with "To:" fields

Expected Results:  
New message with "Bcc:" fields