With WebDAV provided by Microsoft SharePoint, how can users of OS X minimise risks of corruption and multiuser overwrites? There are various OS X approaches to using the WebDAV service provided by Microsoft SharePoint. 

Integrity of data

Answers to this question focus on integrity: 


when a file is used by a single user
when a file is used by multiple users. 


Whilst some parts of an answer may be generalised to WebDAV servers in general, this question focuses on SharePoint – where Microsoft's server and client restrictions cause people to seek alternatives to Microsoft Document Connection. 

Some overlap with an earlier question: 


Is it possible to mount SharePoint as a volume in 10.6?


Reference

Drafted in May 2012 a table: 


File open/lock protection for multi-user use of Microsoft SharePoint


Key points from that draft: 


restrictions in SharePoint make Microsoft Office 2011 incompatible with file system integration
Microsoft Document Connection lacks file system integration.


If any reader can draw a conclusion that differs from what's tabled: I'll welcome discussion in Ask Different Chat, or add your answer below. 

Some parts of that table will become answers to this question …
Use the web interface provided by SharePoint

Tested with the following apps: 


LibreOffice 
Microsoft Excel
Microsoft PowerPoint
Microsoft Word
NeoOffice.


Pros

For multiple users of SharePoint, protection through the web interface seems good. 

Cons

No file system integration.